fixed trailing space bug in contenteditable elements

src/Types/Array.js

@@ -52,6 +52,9 @@
         this.eventHandler.callUserEventListeners(userEvents);
       });
     }
+    get length () {
+      return this.idArray.length;
+    }
     get (pos) {
       if (pos == null || typeof pos !== "number") {
           throw new Error("pos must be a number!");

src/Types/TextBind.js

@@ -160,7 +160,7 @@
             return true;
           } else if (char.length > 0) {
             var r = createRange();
-            var pos = Math.min(r.left, r.right);
+            var pos = Math.min(r.left, r.right, word.length);
             var diff = Math.abs(r.right - r.left);
             word.delete(pos, diff);
             word.insert(pos, char);